Small Science最新文献_第3页

Methylhydrazine Lone-Pair Engineering for Polar Lead-Free Perovskite Enables Self-Powered X-Ray Detection. 极性无铅钙钛矿甲基肼单对工程实现自供电x射线检测。

IF 11.1

Small Science Pub Date : 2025-03-11 eCollection Date: 2025-05-01 DOI: 10.1002/smsc.202400508

Ruiqing Li, Jianbo Wu, Zeng-Kui Zhu, Yaru Geng, Xinling Li, Yifei Wang, Bohui Xu, Zheshuai Lin, Junhua Luo

{"title":"Methylhydrazine Lone-Pair Engineering for Polar Lead-Free Perovskite Enables Self-Powered X-Ray Detection.","authors":"Ruiqing Li, Jianbo Wu, Zeng-Kui Zhu, Yaru Geng, Xinling Li, Yifei Wang, Bohui Xu, Zheshuai Lin, Junhua Luo","doi":"10.1002/smsc.202400508","DOIUrl":"10.1002/smsc.202400508","url":null,"abstract":"Lead-free A3Bi2I9-type perovskites demonstrate excellent performance in direct X-ray detection owing to their high bulk resistivity and reduced ion migration. However, the reported centrosymmetric A3Bi2I9 can only operate with external voltage, inevitably resulting in energy consumption and bulky monolithic circuits, limiting their further development. Herein, exploiting the methylhydrazine (MHy) cation with 2s 2 lone-pair electrons (LPEs), a chiral-polarity perovskite MHy3Bi2I9 are obtained and explored its self-powered X-ray detection properties. Where MHy forms the strong hydrogen bond interaction with the inorganic framework, resulting in the asymmetric Bi2I9 unit. Meanwhile, the 2s 2 LPEs contribute to generating MHy dipole moments, leading to spontaneous polarization. On the one hand, spontaneous polarization acts as a driving force to realize the X-ray-generated carriers' separation and transport to acquire self-powered detection ability. On the other hand, the reduced noise current and dark current under zero bias further increase the signal-to-noise ratio and lower the detection limit. Notably, the MHy3Bi2I9 single-crystal-based detector displays a considerable sensitivity (106 μC Gy-1 cm-2) and an ultralow detection limit (55 nGy s-1) in self-powered mode. Herein, new insights for constructing polar lead-free perovskite and realizing unprecedented A3Bi2I9-type self-powered X-ray detectors are provided.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 5","pages":"2400508"},"PeriodicalIF":11.1,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12087766/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144112067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kapitza Length at Solid-Liquid Interface: From Nanoscale to Microscale. 固液界面Kapitza长度：从纳米尺度到微尺度。

IF 11.1

Small Science Pub Date : 2025-03-08 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400626

Wentao Chen, Gyoko Nagayama

{"title":"Kapitza Length at Solid-Liquid Interface: From Nanoscale to Microscale.","authors":"Wentao Chen, Gyoko Nagayama","doi":"10.1002/smsc.202400626","DOIUrl":"10.1002/smsc.202400626","url":null,"abstract":"Understanding thermal energy transport at solid-liquid interfaces is critical for enhancing the performance of nano- or microscale systems. Although extensive studies have addressed the interfacial thermal resistance, known as Kapitza length, its impact on interfacial heat transfer from nanoscale to microscale remains limited. This study explores the Kapitza length at hydrophilic and hydrophobic solid-liquid interfaces under constant heat flux or overall temperature difference using nonequilibrium molecular dynamics simulations. The findings reveal that Kapitza length remains nearly constant under constant heat flux, while it is comparable to the liquid film thickness under constant overall temperature differences in both nano- and microscale systems. Notably, a giant Kapitza length of 1382 nm was found at a hydrophobic solid-liquid interface with a 1082 nm-thick liquid film. Upon comparing Kapitza length obtained from simulation with experimental results, three primary regimes of solid-liquid interfacial heat transfer are identified: phononic, transition, and conductive regimes. These insights highlight the substantial effect of Kapitza length on solid-liquid interfacial heat transfer from nano- to microscales, offering potential avenues for advanced thermal management in nano- or microscale systems.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400626"},"PeriodicalIF":11.1,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168602/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning-Assisted Prediction and Generation of Antimicrobial Peptides. 机器学习辅助抗菌肽的预测和生成。

IF 11.1

Small Science Pub Date : 2025-03-06 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400579

Sukhvir Kaur Bhangu, Nicholas Welch, Morgan Lewis, Fanyi Li, Brint Gardner, Helmut Thissen, Wioleta Kowalczyk

{"title":"Machine Learning-Assisted Prediction and Generation of Antimicrobial Peptides.","authors":"Sukhvir Kaur Bhangu, Nicholas Welch, Morgan Lewis, Fanyi Li, Brint Gardner, Helmut Thissen, Wioleta Kowalczyk","doi":"10.1002/smsc.202400579","DOIUrl":"10.1002/smsc.202400579","url":null,"abstract":"Antimicrobial peptides (AMPs) offer a highly potent alternative solution due to their broad-spectrum activity and minimum resistance development against the rapidly evolving antibiotic-resistant pathogens. Herein, to accelerate the discovery process of new AMPs, a predictive and generative algorithm is build, which constructs new peptide sequences, scores their antimicrobial activity using a machine learning (ML) model, identifies amino acid motifs, and assembles high-ranking motifs into new peptide sequences. The eXtreme Gradient Boosting model achieves an accuracy of ≈87% in distinguishing between AMPs and non-AMPs. The generated peptide sequences are experimentally validated against the bacterial pathogens, and an accuracy of ≈60% is achieved. To refine the algorithm, the physicochemical features are analyzed, particularly charge and hydrophobicity of experimentally validated peptides. The peptides with specific range of charge and hydrophobicity are then removed, which lead to a substantial increase in an experimental accuracy, from ≈60% to ≈80%. Furthermore, generated peptides are active against different fungal strains with minimal off-target toxicity. In summary, in silico predictive and generative models for functional motif and AMP discovery are powerful tools for engineering highly effective AMPs to combat multidrug resistant pathogens.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400579"},"PeriodicalIF":11.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168616/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Curvature-Enhanced Superomniphobic Property for Minimizing Contact Time of Low-Surface-Tension Liquid. 曲率增强的超疏水性可减少低表面张力液体的接触时间。

IF 11.1

Small Science Pub Date : 2025-03-04 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400631

Hyunah Ahn, Geun-Tae Yun, Jin Ryu, Gyu-Min Jang, Sung Gap Im, Hee-Tae Jung

{"title":"Curvature-Enhanced Superomniphobic Property for Minimizing Contact Time of Low-Surface-Tension Liquid.","authors":"Hyunah Ahn, Geun-Tae Yun, Jin Ryu, Gyu-Min Jang, Sung Gap Im, Hee-Tae Jung","doi":"10.1002/smsc.202400631","DOIUrl":"10.1002/smsc.202400631","url":null,"abstract":"In nature, the springtail represents an ideal superomniphobic system, exhibiting remarkable resistance to organic liquids in both static and dynamic states. This behavior is attributed to the hierarchical structure of their skin, consists of micro- and nanostructures. While numerous artificial superomniphobic surfaces have been developed to mimic its geometry and properties, previous designs are limited to flat surfaces and failed to incorporate the curvature of the springtail's cuticle. Here, a curved superomniphobic surface is first developed that mimics both the curved shape and hierarchical structure of springtail skin. This system developed on the flexible substrate reveals the significant role that curvature plays in reducing the contact time of low-surface-tension liquid. While the static repellency on curved and flat surfaces is comparable, droplet rebound dynamics are distinctive on curved surfaces, showing asymmetric bouncing that conforms to the curvature. This effect intensifies with increased curvature, leading to a reduction in contact time by up to 54%, a record for organic liquid. This study uncovers the crucial role of surface curvature in springtail superomniphobicity and offers valuable insights for designing advanced omniphobic systems.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400631"},"PeriodicalIF":11.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168612/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular Engineering for Enhancing the Dielectric and Optoelectronic Properties of Antimony Corroles. 提高锑微粒介电及光电性能的分子工程。

IF 11.1

Small Science Pub Date : 2025-03-04 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400589

Tanmoy Pain, Md Saifuddin, Anshuman Sahoo, Biplab Mahapatra, Subhajit Kar, Rwiddhi Chakraborty, Satyaprasad P Senanayak, Sanjib Kar

{"title":"Molecular Engineering for Enhancing the Dielectric and Optoelectronic Properties of Antimony Corroles.","authors":"Tanmoy Pain, Md Saifuddin, Anshuman Sahoo, Biplab Mahapatra, Subhajit Kar, Rwiddhi Chakraborty, Satyaprasad P Senanayak, Sanjib Kar","doi":"10.1002/smsc.202400589","DOIUrl":"10.1002/smsc.202400589","url":null,"abstract":"Herein, the role of molecular engineering on the optoelectronic properties of antimony corroles with two distinct β-substituents and two different antimony oxidation states is studied. Insertion of a strong electron-withdrawing SCN group on the bi-pyrrole unit of the corrole increases the molecular dipole moment. Consequently, the dielectric constant is enhanced by up to threefold, reaching a value of 8 for antimony(V) tetra(thiocyano)corrole, significantly higher than any solution-processable organic semiconductor reported to date. Moreover, this SCN-substituted molecule also exhibits an increased charge carrier mobility by at least two orders of magnitude. A combination of suitable metallic oxidation state and SCN substitution is crucial in defining absorption, charge carrier mobility, and dielectric constant, all of which impact photovoltaic performance. The fluorescence quantum yield of the champion molecule increases by 300%, and the charge carrier lifetime is extended by twofold, indicating fewer nonradiative recombination pathways or a lower degree of disorder. Consequently, single-component photodetectors with white light responsivity as high as 10 A W-1, ranking among the best in single-component donor-based organic semiconductors, and a single-component solar cell fabricated from antimony(V) tetra(thiocyano)corrole that exhibits an open-circuit voltage of 0.7 V, at least three times higher than single-component poly(3-hexylthiophene) (P3HT)-based photovoltaic devices, are demonstrated.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400589"},"PeriodicalIF":11.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168605/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional Magnetic Ionic Liquid-Carbon Nanohorn Complexes for Targeted Cancer Theranostics. 用于靶向癌症治疗的多功能磁性离子液体-碳纳米角复合物。

IF 11.1

Small Science Pub Date : 2025-03-03 eCollection Date: 2025-05-01 DOI: 10.1002/smsc.202400640

Yun Qi, Eijiro Miyako

{"title":"Multifunctional Magnetic Ionic Liquid-Carbon Nanohorn Complexes for Targeted Cancer Theranostics.","authors":"Yun Qi, Eijiro Miyako","doi":"10.1002/smsc.202400640","DOIUrl":"10.1002/smsc.202400640","url":null,"abstract":"Establishing a rational and simplified design for nanoparticles that selectively target and eliminate cancer cells is a crucial aspect of cancer treatment. In this study, a new multifunctional nanocomplex is developed based on a photoexothermic carbon nanohorn comprising the magnetic and anticancer ionic liquids 1-butyl-3-methylimidazolium tetrachloroferrate and fluorescent indocyanine green, synthesized through a convenient sonication process. The synthesized nanocomplexes exhibit unique therapeutic, photothermal, magnetic, and fluorescent properties, enabling chemotherapeutic, light-, and magnetic-field-driven cancer theranostics. Furthermore, this nanocomplex demonstrates prolonged water-dispersing stability (7 days), high photothermal conversion efficiency (63%), and remarkable stability under biologically permeable near-infrared laser irradiation. Simple magnetic guidance significantly enhances the accumulation of nanocomplexes at tumor sites, facilitating targeted delivery. In vitro and in vivo studies have demonstrated potent anticancer efficacy, high selective cytotoxicity against cancer cells, and minimal impact on normal tissues. This study represents the first application of magnetic ionic liquids in cancer treatment and provides a valuable platform for advanced nanotheranostics.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 5","pages":"2400640"},"PeriodicalIF":11.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12087772/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144112042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable Fabrication of Highly Organized, Horizontally Aligned Sub-5 nm Silicon Nanowires via Chemical Vapor Etching. 利用化学气相蚀刻技术制造高度有序、水平排列的亚5纳米硅纳米线。

IF 11.1

Small Science Pub Date : 2025-02-28 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400627

Juyeon Seo, Peiyun Feng, Jianlin Li, Sanghyun Hong, Sen Gao, Ji Young Byun, Yung Joon Jung

{"title":"Scalable Fabrication of Highly Organized, Horizontally Aligned Sub-5 nm Silicon Nanowires via Chemical Vapor Etching.","authors":"Juyeon Seo, Peiyun Feng, Jianlin Li, Sanghyun Hong, Sen Gao, Ji Young Byun, Yung Joon Jung","doi":"10.1002/smsc.202400627","DOIUrl":"10.1002/smsc.202400627","url":null,"abstract":"Herein, the scalable fabrication of hierarchical silicon structures featuring high-density, horizontally super-aligned sub-5 nm silicon nanowires (SiNWs), is reported. These unprecedented, highly organized silicon architectures with tunable sizes and densities are fabricated using straightforward micro-patterned SiO2/Si templates followed by a chemical vaporetching process. In time-resolved structural analysis, it is revealed that rapid, aggressive etching is crucial for creating an inhomogeneous spatial distribution of vapor etchants, inducing surface defects acting as preferential sites for localized anisotropic silicon etching along <111> direction. The efficacy of this unique structure is demonstrated as a single-molecule detectable surface-enhanced Raman scattering sensor, incorporating sub-10 nm silver plasmonic nanoparticles. Its distinct structural features-marked by quantum-confined dimensions, ultrahigh surface area, dual-scale roughness, and exceptional uniformity-enable significant enhancement of optical response and detection sensitivity down to 10-11 m. These highly controlled sub-5 nm SiNW architecture can broaden the applications of quantum nanowires in chemical and bio-sensing and other emerging technologies.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400627"},"PeriodicalIF":11.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168600/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Native and Engineered Extracellular Vesicles for the Treatment of Acute Lung Injury and Acute Respiratory Distress Syndrome. 天然和工程细胞外囊泡治疗急性肺损伤和急性呼吸窘迫综合征。

IF 11.1

Small Science Pub Date : 2025-02-26 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400606

Zhengyan Gu, Wenjun Xue, Guanchao Mao, Zhipeng Pei, Jingjing Li, Mingxue Sun, Xinkang Zhang, Shanshan Zhang, Songling Li, Jinfeng Cen, Kai Xiao, Ying Lu, Qingqiang Xu

{"title":"Native and Engineered Extracellular Vesicles for the Treatment of Acute Lung Injury and Acute Respiratory Distress Syndrome.","authors":"Zhengyan Gu, Wenjun Xue, Guanchao Mao, Zhipeng Pei, Jingjing Li, Mingxue Sun, Xinkang Zhang, Shanshan Zhang, Songling Li, Jinfeng Cen, Kai Xiao, Ying Lu, Qingqiang Xu","doi":"10.1002/smsc.202400606","DOIUrl":"10.1002/smsc.202400606","url":null,"abstract":"Extracellular vesicles (EVs) are lipid bilayer nanoparticles naturally released from cells, playing a crucial role in intercellular communication. They modulate gene expression and regulate physiological and pathological processes, including acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). Research has shown that EVs contain a variety of active components, are biocompatible and small in size, and do not trigger immune rejection, making the infusion of exogenous EVs a promising therapeutic tool. With further research, engineering strategies have been proposed to enhance the clinical potential of EVs. These strategies involve modifying either donor cells that secrete EVs or the EVs themselves and can be engineered to circumvent the limitations of native EVs. In this review, an overview of the biological properties of native EVs is provided and the current therapeutic potential of native and engineered EVs in treating ALI/ARDS, along with the latest research findings, is summarized. The challenges and opportunities for clinical translation of EVs as a novel therapeutic tool are also discussed, offering new insights into the treatment of ALI/ARDS using EV engineering technology.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400606"},"PeriodicalIF":11.1,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168619/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solvato/Vapochromism-Based Alcohol Sensing through Metal-Organic Framework Thin Films with Coordinatively Unsaturated Metal Sites. 具有配位不饱和金属位的金属-有机骨架薄膜的溶剂/气相变色醇传感。

IF 11.1

Small Science Pub Date : 2025-02-22 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400634

Yuto Toki, Kenji Okada, Arisa Fukatsu, Yuta Tsuji, Masahide Takahashi

{"title":"Solvato/Vapochromism-Based Alcohol Sensing through Metal-Organic Framework Thin Films with Coordinatively Unsaturated Metal Sites.","authors":"Yuto Toki, Kenji Okada, Arisa Fukatsu, Yuta Tsuji, Masahide Takahashi","doi":"10.1002/smsc.202400634","DOIUrl":"10.1002/smsc.202400634","url":null,"abstract":"Ethanol (EtOH) is a ubiquitous compound with critical applications across various industries, necessitating accurate and reliable sensing for sanitation, quality control, and environmental monitoring. Chromism-based sensors, known for their simplicity, portability, and real-time detection capabilities, have faced limitations in EtOH sensing due to insufficient sensitivity, low selectivity, irreversibility, and low color perception. Herein, a groundbreaking solvato/vapochromism-based EtOH sensor utilizing a Cu-based metal-organic framework (MOF) thin film, Cu-MOF-74, is reported. The conversion of Cu-based ceramics to Cu-MOF-74 facilitates the fabrication of solvato/vapochromic MOF thin films with low light scattering, enabling effective colorimetric analysis. The Cu-MOF-74 thin films demonstrate rapid and reversible solvato/vapochromism upon the adsorption of guest molecules, including water and EtOH. This unique behavior allows for the precise and reliable detection of EtOH across the entire concentration range. Furthermore, a smartphone application is developed to detect EtOH concentrations, enabling rapid and convenient evaluation of EtOH levels. The findings represent a significant advancement in EtOH sensing technology, overcoming the limitations of traditional methods. The Cu-MOF-74-based sensor offers a versatile and reliable solution for various applications, including environmental monitoring, process control, and healthcare.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400634"},"PeriodicalIF":11.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168603/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-Functional High-Entropy Polymer Exhibiting Giant Cross-Energy Couplings at Low Fields. 双功能高熵聚合物在低场表现出巨大的交叉能量耦合。

IF 11.1

Small Science Pub Date : 2025-02-22 eCollection Date: 2025-06-01 DOI: 10.1002/smsc.202400624

Guanchun Rui, Wenyi Zhu, Li Li, Jongcheol Lee, Yiwen Guo, Qin Zou, Siyu Wu, Ruipeng Li, Thierry Lannuzel, Fabrice Domingues Dos Santos, Mark A Aubart, Seong H Kim, Long-Qing Chen, Lei Zhu, Zi-Kui Liu, Q M Zhang

{"title":"Dual-Functional High-Entropy Polymer Exhibiting Giant Cross-Energy Couplings at Low Fields.","authors":"Guanchun Rui, Wenyi Zhu, Li Li, Jongcheol Lee, Yiwen Guo, Qin Zou, Siyu Wu, Ruipeng Li, Thierry Lannuzel, Fabrice Domingues Dos Santos, Mark A Aubart, Seong H Kim, Long-Qing Chen, Lei Zhu, Zi-Kui Liu, Q M Zhang","doi":"10.1002/smsc.202400624","DOIUrl":"10.1002/smsc.202400624","url":null,"abstract":"A key component of cooling devices is the transfer of entropy from the cold load to heat sink. An electrocaloric (EC) polymer capable of generating both large electrocaloric effect (ECE) and substantial electroactuation can enable EC cooling devices to pump heat without external mechanisms, resulting in compact designs and enhanced efficiency. However, achieving both high ECE and significant electroactuation remains challenging. Herein, it is demonstrated that poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene-double bond) [P(VDF-TrFE-CFE-DB)] tetrapolymers can simultaneously generate high electrocaloric effects and electroactuations under low fields. These P(VDF-TrFE-CFE-DB) tetrapolymers are synthesized through the dehydrochlorination of P(VDF-TrFE-CFE) terpolymer. By facile tuning the composition of the initial terpolymer to avoid pure relaxor state, tetrapolymers with optimal DB compositions are achieved, near the critical endpoint of normal ferroelectric phase with diffused phase transition. The nearly vanishing energy barriers between the nonpolar to polar phases result in a strong electrocaloric response and significant electroactuation. Specifically, the P(VDF-TrFE-CFE-DB) tetrapolymer exhibits an EC entropy change ΔS of 100 J kg-1 K-1 under 100 MV m-1: comparable to state-of-the-art (SOA) EC polymers, while delivering nearly twice the electroactuation of the SOA EC polymers. This work presents a general strategy for developing EC materials that combine large electrocaloric effect and electroactuation at low electric fields.","PeriodicalId":29791,"journal":{"name":"Small Science","volume":"5 6","pages":"2400624"},"PeriodicalIF":11.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12168593/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0